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28 Cards in this Set
- Front
- Back
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Why didn’t most scientist initially believe that chromosomes were responsible for inheritance? |
Because there was so few chromosomes, there wasn't enough to make it seem like it wasn't possible to be so different. |
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Not all traits on a chromosome are linked together because of ____. |
Crossing over happens |
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If A and B are linked then the AB and ab the possible genotypes would be a ___/___ split of _____ and _____. |
a 50/50 split of AB and ab |
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If they are unlinked then the genotype breakdown would be _________________________ |
Ab, AB, ab, aB |
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_____________ show the relative distance between genes. |
Recombination frequency |
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The two types of chromosomal abnormalities are based on _______________________________ |
chromosome numbers or structure of the chromosome up |
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A _____ is a picture of all of the chromosomes a person has Chromosomes are numbered based on their _________. |
Karyotype |
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Chromosomes are numbered based on their _________. |
Height |
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Which chromosomes are out of order |
21 and 22 |
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Inactive X chromosomes are called _____________ |
Barr bodies |
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Klinefelter Syndrome means a person has what chromosome abnormality? |
2 x, 1 y |
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Turner’s Syndrome means a person has what chromosome abnormality? |
Girl only has one X. Looks less feminine, reduced fertility |
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Triplo-X means a person has what chromosome abnormality? |
Girl has 3 x’s. Reduces fertility |
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Chromosome duplications occur when |
duplicates part of the DNA that isn't supposed to be there |
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Chromosome deletions occur when |
removed some of the DNA |
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Inversions occur when |
section of the DNA that gets flipped |
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Pericentric inversions are |
going to include the centromere |
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Paracentric inversions are |
on one side of the centromere__ |
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Translocations are when a |
when a segment of a chromosome detaches and reattaches to a different nonhomologous chromosome |
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in meiosis causes disorders in chromosome number |
Nondisjunction |
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Euploid |
having the correct number of chromosomes |
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Anaploid- |
Incorrect # of chromosomes |
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Monosomy- |
having only one of a chromosome (fail to develop) |
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Trisomy- |
having only 3 of a chromosome (most fail to develop) |
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Trisomy 13 |
Patau syndrome |
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Trisomy 18 |
Edwards syndrome |
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Trisomy 21 |
Down syndrome |
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Sex chromosome nondisjunction cause an incorrect number of chromosome __to be inherited. |
X |
